500018685457 has 2 divisors, whose sum is σ = 500018685458. Its totient is φ = 500018685456.

The previous prime is 500018685427. The next prime is 500018685541. The reversal of 500018685457 is 754586810005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325360723216 + 174657962241 = 570404^2 + 417921^2 .

It is a cyclic number.

It is not a de Polignac number, because 500018685457 - 2¹⁵ = 500018652689 is a prime.

It is a super-2 number, since 2×500018685457² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 500018685457.

It is not a weakly prime, because it can be changed into another prime (500018685427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250009342728 + 250009342729.

It is an arithmetic number, because the mean of its divisors is an integer number (250009342729).

Almost surely, 2^500018685457 is an apocalyptic number.

It is an amenable number.

500018685457 is a deficient number, since it is larger than the sum of its proper divisors (1).

500018685457 is an equidigital number, since it uses as much as digits as its factorization.

500018685457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344000, while the sum is 49.

The spelling of 500018685457 in words is "five hundred billion, eighteen million, six hundred eighty-five thousand, four hundred fifty-seven".